/*
 * Copyright (c) 2018 RockScript.io.
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package io.rockscript.engine.impl;

public class AssignmentExpressionExecution extends Execution<AssignmentExpression> {

  public AssignmentExpressionExecution(AssignmentExpression assignment, Execution parent) {
    super(parent.createInternalExecutionId(), assignment, parent);
  }

  @Override
  public void start() {
    startChild(element.getLeft());
  }

  public static boolean supportsOperator(String operator) {
    return "=".equals(operator);
  }

  @Override
  public void childEnded(Execution child) {
    if (children.size()==1) {
      startChild(element.getRight());
    } else {
      Assignable assignable = (Assignable) children.get(0);
      Object value = children.get(1).getResult();

      String operator = element.getOperator();
      if ("=".equals(operator)) {
        assignable.assign(value);
      }
      end();
    }
  }
}
